Portable power station



FIG. 1 is a perspective view of a portable power station embodying my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof, the other side view being a mirror image thereof; and,

FIG. 5 is a top view thereof. 

The ornamental design for a portable power station, as shown and described. 